Woofer/Midrange Driver

Mounting

Mounting the Woofer/Midrange to Stock Hole Locations

1.Access the stock speaker location and remove the stock speaker. The 408 and 508GTi include mounting ring adapters which allow the speaker to be mounted in standard 4" and 51/4" holes respectively.

2.Attach the mounting ring adapter to the stock location using four #8 x 11/4" screws as shown in Figure C.

3.Attach the foam gasket to the back of the woofer/midrange. Connect the speaker wire from the crossover terminals marked “W” to the speaker by either soldering (preferred) or using crimp terminals. Connect the wire from the “W+” terminal on the crossover to the red “W” terminal on the woofer/midrange. Repeat the same process for the “W–” terminal (see Figure K for details).

4.Mount the woofer/midrange driver to the adapter ring using three #8 x 5/8" screws and three shoulder washers as shown in Figure C.

5.Replace the stock speaker panels.

Mounting the Woofer/Midrange in Custom Locations

WOOFER/

MIDRANGE

FABRIC

DISPLACEMENT

RING

Figure D

1.Snap the grille assembly of the speaker onto the driver and choose three hole locations so that the grille logo is oriented as desired for your installation. Use the Fabric Displacement Ring included in the package to mark the location of the three screw holes and the speaker cutout holes (cutout hole sizes are listed in the Specifications section). Before cutting or drilling make sure that there are no car components, electrical wiring or any other items that could be damaged.

2.Cut out the speaker hole at the mounting location and drill the three marked holes with a 1/8" (3mm) drill.

3.Run speaker wire to the hole location, making sure that either an active or the included passive crossover is connected to the speaker (see Figure K for wiring details).

4.Put the speaker Fabric Displacement Ring under the speaker as shown in Figure D.

5.Attach the foam gasket to the back of the woofer/midrange. Connect the speaker wire from the crossover terminals marked “ W” to the speaker by either soldering (preferred) or using crimp terminals. Connect the wire from the “W+” terminal on the crossover to the red “W” terminal on the woofer/ midrange. Repeat the same process for the “W–” terminal (see Figure K for details).

6.Mount the speaker to the hole location using three #8 x 11/4" screws and three shoulder washers as shown in Figure D.

7.Push the grille down onto the speaker making sure the tabs on the speaker match with the slots in the grille. Twist the grille about 1/2" (12mm) clockwise to lock the grille into place.

7

Page 6 Page 8
Page 7
Image 7
JBL 508GTI manual Woofer/Midrange Driver Mounting, Mounting the Woofer/Midrange to Stock Hole Locations
Page 6 Page 8

508GTI specifications

The JBL 508GTI is a remarkable addition to the world of professional audio monitors, designed to satisfy discerning listeners as well as studio professionals. With its striking design and cutting-edge technology, the 508GTI offers an impressive listening experience tailored for various audio applications, from music production to film scoring.

At the heart of the 508GTI lies a 5-inch low-frequency woofer made of a proprietary polypropylene composite, ensuring excellent bass response and clarity. This cone design minimizes distortion, allowing for clean reproduction of bass frequencies down to 45 Hz. Complementing the woofer is a 1-inch titanium dome tweeter that delivers smooth and precise high frequencies up to 40 kHz. This wide frequency response ensures that the 508GTI reproduces audio accurately, making it easier for sound engineers to mix music that translates well across different playback systems.

One of the standout features of the JBL 508GTI is its innovative Image Control Waveguide technology. This sophisticated design optimizes the speaker's dispersion pattern, allowing for a larger sweet spot while maintaining excellent stereo imaging. As a result, listeners can enjoy an immersive sound experience even when they are not seated directly in front of the monitors.

The 508GTI also incorporates advanced bi-amplification, utilizing separate amplifiers for the woofer and tweeter. With a total power output of 82 watts, this design ensures that each driver operates at its peak performance without compromise. Additionally, the built-in DSP processing allows users to tailor the speaker’s performance to their specific acoustic environment, making it highly versatile for any studio setting.

Connectivity options on the JBL 508GTI include XLR and TRS balanced inputs, providing flexibility for various professional audio sources. The speaker is also equipped with rear controls for adjusting high and low-frequency response, enabling users to optimize their listening experience based on the room's acoustics.

In summary, the JBL 508GTI combines premium materials, innovative technologies, and versatile features, making it an exceptional choice for audio professionals seeking accuracy and reliability. Its blend of performance, design, and functionality ensures that it stands out in the competitive field of nearfield monitors, delivering a listening experience that is both enjoyable and precise.
Top Page Image Contents